# Relationship history for MSHA mine 1515118

Current hierarchy: **Siegel John J Jr → Flaget Fuels Inc → No 1 Prep Plant**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Buchanan Fuel Inc → No 1 Prep Plant; 1985-03-01 to 1988-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Buchanan I H Iii → No 1 Prep Plant; 1985-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Buchanan I H Iii → Buchanan Fuel Inc; 1985-03-01 to 1988-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Siegel John J Jr → No 1 Prep Plant; 1987-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Flaget Fuels Inc → No 1 Prep Plant; 1988-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Siegel John J Jr → Flaget Fuels Inc; 1988-06-17 to current/open; source msha-controller-operator-history